Illustration of polyhedron
polyhedron
noun
poly·he·dron
ˌpä-lē-ˈhē-drən 
plural polyhedrons or polyhedra
ˌpä-lē-ˈhē-drə
: a solid formed by plane faces
Examples of polyhedron in a Sentence
Recent Examples on the Web
First place went to Connor Hill, a Pennsylvania student who discovered a way to identify all possible noble polyhedra — symmetrical shapes with straight edges and flat sides.
—
Jemma Stephenson, San Diego Union-Tribune, 14 Mar. 2026
Combined, these boundaries can divide space into a complex three-dimensional shape called a polyhedron.
—Quanta Magazine, 13 Oct. 2025
Domokos wanted to know if a pointy polyhedron could have a similar property.
—Elise Cutts, Wired News, 10 Aug. 2025
Perhaps the greatest long shot was the Bone Conductive Instrument, a wooden polyhedron designed to be held snugly to the breast, with the side of one’s face resting atop it, almost like an infant.
—Matthew Sherrill, Harper's Magazine, 19 Feb. 2025
Euler implicitly assumed his polyhedra were convex, meaning a line segment joining any two points stayed completely within the polyhedron.
—quantamagazine.org, 26 Jan. 2021
Mold that box into a pyramid or tetrahedron or any other everyday polyhedron.
—Devin Powell, Discover Magazine, 20 Mar. 2019
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Jemma Stephenson, San Diego Union-Tribune, 14 Mar. 2026
Combined, these boundaries can divide space into a complex three-dimensional shape called a polyhedron.
—Quanta Magazine, 13 Oct. 2025
Domokos wanted to know if a pointy polyhedron could have a similar property.
—Elise Cutts, Wired News, 10 Aug. 2025
Perhaps the greatest long shot was the Bone Conductive Instrument, a wooden polyhedron designed to be held snugly to the breast, with the side of one’s face resting atop it, almost like an infant.
—Matthew Sherrill, Harper's Magazine, 19 Feb. 2025
Euler implicitly assumed his polyhedra were convex, meaning a line segment joining any two points stayed completely within the polyhedron.
—quantamagazine.org, 26 Jan. 2021
Mold that box into a pyramid or tetrahedron or any other everyday polyhedron.
—Devin Powell, Discover Magazine, 20 Mar. 2019
Cite this Entry
“Polyhedron.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/polyhedron. Accessed 22 Mar. 2026.
Copy CitationKids Definition
polyhedron
noun
poly·he·dron
ˌpäl-i-ˈhē-drən
plural polyhedrons or polyhedra
-drə
: a geometric solid whose faces are each flat polygons
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